EP1187502B1 - Verfahren zum Kommunizieren zwischen einer Basisstation und einem mobilen Telefon sowie ein dafür geeignetes mobiles Telefon - Google Patents

Verfahren zum Kommunizieren zwischen einer Basisstation und einem mobilen Telefon sowie ein dafür geeignetes mobiles Telefon Download PDF

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Publication number
EP1187502B1
EP1187502B1 EP01402033A EP01402033A EP1187502B1 EP 1187502 B1 EP1187502 B1 EP 1187502B1 EP 01402033 A EP01402033 A EP 01402033A EP 01402033 A EP01402033 A EP 01402033A EP 1187502 B1 EP1187502 B1 EP 1187502B1
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Prior art keywords
signals
protocol
fact
transmitted
data
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Expired - Lifetime
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EP01402033A
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English (en)
French (fr)
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EP1187502A1 (de
Inventor
Rafael Alos
Frédéric Heurtaux
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Sagem SA
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Sagem SA
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/28—Discontinuous transmission [DTX]; Discontinuous reception [DRX]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/15—Setup of multiple wireless link connections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals

Definitions

  • the subject of the present invention is a communication method between a base station and a mobile phone as well as a mobile phone usable to implement the method.
  • the object of the invention is to allow greater use of a mobile phone even if it mobile phone is of a degraded class, a priori incapable of performs certain functions. More generally, the invention aims to reduce the cost of mobile phones by allowing phones basic, low-cost mobiles to operate as well as mobile telephones with enhancements.
  • the invention aims to allow simultaneous use of a mobile phone in circuit mode and in packet mode.
  • the use of mobile phones in circuit mode corresponds to the establishment of a circuit between two interlocutors, possibly between two data transmission devices.
  • the mobile phone of the invention will not only be used in the use of speech, but may allow, in particular via a connector base, to serve as a modem for such data transmission.
  • a functioning, an operation, a operating, a working in circuit mode with the consequence that, for a duration of one communication, a communication channel is reserved for the communication. Consequently the user pays the rental of this channel to pro rata to this communication time, regardless of the broadcast and receiving data.
  • Another known mode of transmission is the mode of transmission. in packages.
  • packets are sent and each packet includes a designation of its recipient.
  • Mobile phones that are not recipients of the information do not keep in their stores the contents of packets that are not intended for them. Otherwise, to prevent these mobile phones from decoding all the packets received, even those which are not intended for them, signals of signals issued by the transmitter, give time appointments to receivers so that they can be satisfied with decoding only signals intended for them.
  • signals of signals issued by the transmitter give time appointments to receivers so that they can be satisfied with decoding only signals intended for them.
  • the most important consequence of the packet transmission is understood that the user does not pay the channel only in proportion to the quantity of packets intended for him or that he sends.
  • a mobile phone to implement these modes of communications, circuit or packet can be of three classes.
  • the class C corresponding to the least performing mobile phones, has a command, imposed by the user in particular using a keyboard, to operate the mobile phone exclusively in circuit mode or in packet mode.
  • the mobile phone sends a signal of type Cc, to signal its use possible in circuit mode, or a Cg type signal (g - GPRS, Global Packet Radio System - global radio packet transmission system) to report its conditioning as a packet receiver.
  • g - GPRS Global Packet Radio System - global radio packet transmission system
  • Class B devices in which the switching of a circuit mode to a packet mode is automatic.
  • the cost of class B devices is little different from the cost of class C devices. It is possible with a class B device to implement a suspend type function - resume, suspend - resume, during which you can freeze a communication session in one mode, start another in one other mode, then go back to the first without losing the information distributed. It is also possible, especially in GPRS mode, to consult a website and switch to speaking mode during communication with the base station. It is not necessary, as with a class C, break the connection with the base station and reset it by declaring another mode of use.
  • the protocol exchange in the circuit mode as well as in the packet mode, in mobile telephony are of the same type, in particular of GSM type. For each of them is defined, in the environment of a given base station, laws of frequencies, emission levels, anticipation times emission time slots and allocations reception. Likewise, tag channels can be differentiated.
  • the mobility management mode induces circuits different operations in the circuit mode, which is more particularly intended to ensure this mobility, of those of GPRS mode, per packet, for which mobility is an additional accessory.
  • a classy mobile phone B in practice, is equipped with a dual monitoring system to detect Classic calls and GPRS service requests. This double system standby is likely to operate at the express request (without reset - but not automatically), in a mode or in another.
  • class A mobile telephones To have simultaneous operation in one mode and in the other, class A mobile telephones are provided.
  • these telephones class A mobiles must be equipped with a double transceiver to be able to send and receive both in one mode and another, simultaneously.
  • the cost of these class A devices is significantly higher than that of class B devices and of course than that of class C devices.
  • the object of the invention is to simplify the construction of telephones mobile and, in particular within the framework defined above, to allow class B or even class C mobile phones to function as Class A mobile phones.
  • the difference between phones class B or C mobiles and class A mobile phones is basically that class B and C mobile phones only have only one transmitter-receiver device.
  • GPRS GPRS
  • a channel like allocating a time window in a frame (usually frames with eight time windows - TDMA, Time Division Multiple Acces - time division multiple access), and carrier frequency transmission (or reception).
  • TDMA Time Division Multiple Acces - time division multiple access
  • carrier frequency transmission or reception
  • a channel can be defined by allocating a sequence of special coding. In all cases, a frame corresponds to a duration quantified during which a given amount of information is transmitted.
  • data is transmitted to the mobile phone in packet mode, on the same channel. It would be the same in CDMA mode, where we would use whole frames, with their associated coding sequence, for transmit data to a mobile phone when the remote party is dumb.
  • the circuit mode will most of the time be a voice, although it could be a mode of data transmission.
  • the packet transmission mode will rather be reserved for data transmissions, such as those corresponding to site visits Internet.
  • the invention also relates to a mobile telephone comprising in a memory a first program for implementing a first speech signal transmission protocol and a second program to implement a second signal transmission protocol data, characterized in that it includes a comparator to compare a characteristic part of a signal received during a frame of transmission to an expected pattern, and a circuit for implementing match the first or second program to process another part of the signal received during the same transmission frame.
  • Figure 1 shows a system that can be used to implement the communication method according to the invention.
  • This system includes mobile phones 1 and 2 likely to contact a station basic 3 for exchanging first and second speech signals data signals.
  • the first signals are delivered in circuit mode, and that they represent speech signals.
  • the second signals are delivered in packet mode and represent data signals. They result for example from the consultation of an Internet site. Indeed, in within the framework of the consultation of such a website, sporadic transmission of signals leads to the fact that a large amount of information can be transmitted for a short period followed by a fairly long period, during which the user examines on a screen of his mobile phone images resulting from the consultation. During this fairly long period, no exchange is undertaken.
  • FIG. 2a it is known to use different transmission protocols depending on whether a speaker, who is supposed to be transmitting, speaks or is mute. Whether he speaks or is silent, left part of figure 2a, during a frame 4, it is allocated a time window 5 for transmitting and a time window 6 to receive. The content transmitted in these windows 5 and 6 varies, however, depending on whether the speaker speaks or is silent, or whether the remote party speaks or is silent.
  • Figure 2a thus shows during a first period 7 the implementation work of a first transmission protocol to transmit the signals of speech between the speaker, speaking on the phone 1, and his interlocutor who also speaks. It also shows, during a second period 8, of which the duration is in a example a multiple of 104 frames, the implementation of a second protocol commonly called DTX. As part of GSM, with frames of 4.615 milliseconds, the duration is of period 8 is thus clocked by periods of 0.5 seconds. For such durations that 8, one of the two interlocutors is silent, does not use time window 5, or 6, which is allocated to it.
  • the bit rate is sufficient to code the background noise, and return it to the receiver side, without the user detecting any break.
  • This reconstitution of background noise is also called comfort noise.
  • the DTX protocol thus makes it possible to alternate between a mode of transmission of 260 bits per 20 milliseconds and a transmission mode of 260 bits by 480 milliseconds.
  • the DTX mechanism requires the functions following: a voice activity detector on the transmitter side, evaluation of the background noise on the transmitter side, to transmit the parameters characteristics of this background noise at the receiver, and generation from the side comfort noise receiver during periods when radio transmission is interrupted.
  • SID Silence Descriptor - Description of silence.
  • a series of SID frames is transmitted at the start of each period of inactivity and others are then issued regularly, at at least twice a second during periods of inactivity.
  • a 104-frame hyperframe has 4 groups of 26 frames each group of 26 frames comprising a first group 9 of 8 frames during which the noise characteristics are transmitted.
  • the group 9 is used to refresh the information relating to the ambient noise from the side of the remote speaker.
  • Phone 1 is normally required to receive frames of group 9. In normal times, telephone 1 can switch on sleep during the other frames of the hyperframe.
  • Group 9 is followed by a subgroup 10 of four successive frames supposed to transport speech signals, but which in practice carry nothing if the connection is silent from the transmitter.
  • Subgroup 10 is followed by a time window in a frame known as SACCH whose meaning is Slow Assiocated Control Channel, that is to say Command Channel Associated with Slow Traffic.
  • base station 3 gives telephone 1 the list of radio stations neighboring base that phone 1 should monitor.
  • this window also the telephone 1 goes back to the base station 3 of the measurement information about these neighboring base stations and that it has previously performed.
  • a group of 26 frames is also ended by a frame called Idle, which means idle.
  • Idle a frame that means idle.
  • SCH searches on neighboring base stations. He must bring up the results during the window temporal SACCH.
  • a first grouping 14 of 26 frames follow in hyperframe 8 three other groupings 15, 16 and 17 of 26 frames also. These groups 15 to 17 of course offer frames of the same type as that of group 14.
  • the time windows of these subgroups are used frames 10 to 13 and groups 15 to 17 to transmit data.
  • two operations are to be carried out.
  • the mobile phone receives and decodes the signals transmitted during frames from subgroups of frames 10 to 13, in windows 6, while normally he could have gone to sleep on reception.
  • the operating system of the phone 1 detects that phone 1 is in simultaneous communication with words (because a telephone call was exchanged with a interlocutor) and data (because for example a consultation of a website has been launched). In this case instead of falling asleep during frame groups 10 to 13 the mobile phone will try to decode the signals received during all the frames of these groups of frames 14 to 17.
  • this decoding is carried out according to a third protocol.
  • the third protocol is a packet mode protocol, in particular of GPRS type compatible with the GSM standard.
  • the third protocol is on the other hand, recognizable by the telephone 1, in the signals transmitted, to allow it to decode corresponding data signals as data signals (not as speech signals).
  • a learning sequence 18 is different depending on whether the transmitted bits correspond to words or data.
  • Such a learning sequence 18 includes, in the case of the standard GSM, 26 bits consisting of 5 start bits, 16 significant bits and 5 end bits.
  • a circuit transceiver 19 of telephone 1 is connected by a bus 20 to a microprocessor 21 implementing a general program for managing the telephone 1.
  • This general program is contained in a memory 22 also connected to bus 20.
  • Bus 20 is also connected to circuit 23 acoustic transceiver connected to a microphone 24 and a speaker 25 as well as a keyboard 26 and a screen 27.
  • the keyboard 26 and the screen 27 can be used to view or process data signals while the microphone 24 and speaker 25 are used to process signals speech acoustics.
  • the memory 22 includes in addition to the system operating part 28 of parameters. In this part of parameters are firstly stored frequency law information allowing in particular frequency agility, as well as typical bit sequences to use as a learning sequence.
  • the telephone 1 performs a comparison, schematically represented by a comparator 29 to compare an SP learning sequence stored in the memory 22 and relating to speech signals to a sequence learning really decoded. If this comparison is positive, the comparison function 29 sounds when in circuit mode the telephone 1. Received speech signals are routed through the speaker 25. In the use of the state of the art, if this recognition is not not producing, signals are not processed, and therefore are not transmitted to speaker 25.
  • the comparison function will be split into a comparison function 29 and 30.
  • the learning sequence 18 decoded will then be compared not only to a sequence corresponding to a mode of transmission of words but also to another SD sequence, also agreed in advance and representative of a mode of transmission data, preferably in packets.
  • This SD sequence agreed to the advance is notably signaled to telephone 1 when the latter issues a transmission request in packet mode.
  • the speech sequence, SP is different from the SD training sequence.
  • the signals transmitted in the time windows 6 and on the same frequency as that expected by the telephone 1 have a sequence in the middle part 18 recognizable by the comparator 30. In this case the processing of these signals is carried out in correspondence.
  • Comparison functions 29 and 30 may not be one of them being completed, and depending on whether the decoding result will correspond to the extraction of a sequence expected learning (for example that SP of the circuit mode of speech transmission) this mode will be retained, the other mode being retained in comparison failure.
  • a sequence expected learning for example that SP of the circuit mode of speech transmission
  • Figure 4 shows the simultaneous transmission in the upward direction speech and data from the mobile phone 1.
  • the speaker of the telephone 1 speaks thus, during a telephone call, in the microphone 24 until a date 31 then he is silent and starts talking to a date 32.
  • the microprocessor 21, in execution of the contained program in the memory 22 implements a vocoder 33 which produces outputs digital signals such as 34. These digital signals are signals of silence between dates 31 and 32.
  • Date 31 is, as indicated previously the date when the voice activity detector on the side transmitter detects the end of voice activity.
  • Date 32 is the date it detects the resumption of this vocal activity. This activity detector, where the vocoder 33, therefore produce corresponding t31 and t32 signals for sending data.
  • the user With the keyboard 26, the user composes data messages. According to an improvement of the invention, these data messages are previously saved in a buffer memory 35 in boxes successive memories, via a progressive writing pointer 36.
  • To transmit the data during silences we use the signal t31, signaling the availability of the speech transmission channel (since there is rests) to send data.
  • a read pointer 37 triggered by signal t31 then takes the data from memory 35 and transmits to the transmission circuit 19. When the signal t32 occurs, the pointer reading 37 is blocked and the transmitting device 19 transmits signals word in correspondence.
  • FIG. 1 shows that the base station 3 is connected to circuits 3.1 BSC Base Station Controller - Base Station Controller that provides practices resource management as well as the signaling to be applied for that mobile phones 1 and 2 know how to extract the signals about them signals about other phones mobile.
  • BSC circuits carry signals at the same time from a PSTN, ISDN or other telephone network.
  • PCU Packet Control Unit - Package Control Unit
  • PCU circuits generally play the same role as BSC circuits.
  • BSC circuits are independent of the circuits PKU.
  • mobile phones are required to use channels different depending on whether they have to exchange words or data.
  • phone 1 can therefore receive data on its own reception channel, when its interlocutor remote is mute and receive data on the receive channel of the phone 2 when the remote party on this phone 2 is mute.
  • the base station 3 can in the latter case transmit to telephone 1, on the phone channel 1, speech signals from the other party of this telephone 1 insofar as the latter speaks, and signals from data on the downlink of phone 2, during other windows offset from time window 6 and time window 5.
  • the transmitted data signals will include either a header allowing their recognition as data signals, either preferably according to the invention a different learning sequence indicating the change in protocol.
  • the mobile phone user 2 could also be in data relation with the Intemet network. For then allow phone 1 to know who is receiving the packets of transmitted data, and given the unexpected nature of the transmission of the latter (they are emitted during communication silences whose distribution is a priori random), we can provide two solutions. According to one first solution, during one of the unused frames of groups 10, we may designate a recipient. Alternatively, in the sequences for the data transmission mode, we will distinguish learning sequences usable by the phone 1 to receive data and training sequences usable by mobile phone 2 to receive data. At decoding only the one who recognizes its data reception training sequence uses information.
  • paging signals When a base station is not connected to a telephone 1, she may call this phone 1 at any time.
  • the signals call signals are called paging signals. These signals include the call 1 on a channel called PCH Paging Channel.
  • the base stations transmit blocks of paging data that the mobile phones are required to listen periodically to find out if they are called by the network.
  • Preferably mobile phones are divided into paging groups, which listen to sequences of blocks of different paging in order to have an optimized flow of incoming calls.
  • the invention provides, if no paging signal is to be sent, to use the paging channel for transmitting data in packet mode.
  • Figure 5 shows a complementary aspect of the invention.
  • the speech data according to a speech protocol, is grouped in blocks and the emission of a block is distributed over 8 frames consecutive.
  • a first block 38 of lyrics is distributed in frames 39 to 46.
  • a second block 47 is distributed in the same conditions in blocks 43 to 46 and 48 to 51.
  • a third block 52 corresponds to rests, following frames 53 to 57 (as well as the eight following frames corresponding to grouping 9 of eight frames, Figure 2a) will be partly unused since there is nothing to transmit. In that case one can use the half-rates thus freed to transmit data.
  • the decoding of the data even sent in mode packets must undergo a decoding corresponding to the decoding of the signals speech since the signals of the third block 52 as well as the signals SIDs must be decoded according to this protocol.
  • the transmission protocol adopted by the mobile phone be the third protocol the one corresponding to the data transmission.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Claims (12)

  1. Verfahren zur Übertragung von Sprach- und Datensignalen zwischen wenigstens einem Mobiltelefon und einer Basisstation eines Mobiltelefonnetzes, bei dem
    akustische Sprachsignale in erste elektrische Sprachsignale umgewandelt werden,
    die elektrischen Sprachsignale gemäß eines ersten Protokolls über einen Übertragungskanal übertragen werden,
    akustische Ruhesignale in zweite elektrische Sprachsignale umgewandelt werden,
    die zweiten elektrischen Sprachsignale gemäß einem zweiten, vom ersten Protokoll unterschiedlichen Protokoll, über denselben Übertragungskanal übertragen werden,
    dadurch gekennzeichnet, dass
    gleichzeitig mit den elektrischen Sprachsignalen elektrische Datensignale über denselben Übertragungskanal nach einem dritten, von den beiden ersten Protokollen unterschiedlichen Protokoll übertragen werden während Zeitfenstern, die vom zweiten Protokoll freigelassen werden.
  2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass während des Empfangs
    das erste oder das zweite Protokoll vom dritten Protokoll durch eine Konfiguration einer unterschiedlichen Lernsequenz unterschieden wird, wobei die Lernsequenz in den gemäß diesen Protokollen übertragenen Symbolketten vorkommt,
    eine empfangene Symbolkette dekodiert wird gemäß einem dieser Protokolle und daraus die Lernfrequenz extrahiert wird,
    aus der Art der aus der empfangenen und decodierten Symbolkette extrahierten Lernsequenz die Art der Signale als Sprach- oder Datensignale abgeleitet wird.
  3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass
    das dritte Protokoll ein Protokoll im Paketmodus ist.
  4. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass
    die zu übertragenden Datenpakete in einem Pufferspeicher gespeichert werden
    und die elektrischen Datensignale übertragen werden, indem sie aus diesem Pufferspeicher ausgelesen werden.
  5. Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass
    der Arbeits- oder Ruhezustand einer Sprachkodiereinrichtung des Mobiltelefons gemessen wird und
    zu übertragende Sprach- oder Datensignale in Abhängigkeit des gemessenen Arbeits- oder Ruhezustand übertragen werden.
  6. Verfahren nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass
    die Übertragung von zweiten elektrischen Sprachsignalen detektiert wird
    und zu übertragende Daten- oder Sprachsignale in Abhängigkeit der Detektion übertragen werden.
  7. Verfahren nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass
    die Basisstation mit ersten Schaltkreisen zur Verwaltung der Übertragung der elektrischen Sprachsignale und mit zweiten Schaltkreisen zur Verwaltung der Übertragung der elektrischen Datensignale versehen ist und
    die ersten und zweiten Schaltkreise sich Informationen zur Synchronisation ihrer Aussendung von elektrischen Signalen übermitteln.
  8. Verfahren nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass
    ein erstes Mobiltelefon elektrische Sprach- oder Ruhesignale mit der Basisstation auf einem ersten Übertragungskanal austauscht,
    ein zweites Mobiltelefon elektrische Sprach- oder Ruhesignale mit der Basisstation auf einem zweiten Übertragungskanal austauscht,
    das erste Mobiltelefon Datensignale mit der Basisstation auf dem zweiten Übertragungskanal austauscht.
  9. Verfahren nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass
    die Fenster auf einem Paging-Kanal offengelassen werden.
  10. Verfahren nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass
    in den Rahmen, die gemäß dem zweiten Protokoll gesendet werden, Rahmen elektrischer Ruhesignale ergänzt werden durch elektrische Datensignale.
  11. Verfahren nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, dass
    das Mobiltelefon entweder die ersten beiden Protokolle oder das dritte Protokoll annimmt, und
    das Mobiltelefon ohne andere Zuordnung das dritte Protokoll annimmt.
  12. Mobiltelefon mit einem Speicher mit einem ersten Programm zur Umsetzung eines ersten Übertragungsprotokolls für Sprachsignale und einem zweiten Programm zur Umsetzung eines zweiten Übertragungsprotokolls zur Übertragung von Datensignalen, dadurch gekennzeichnet, dass es einen Vergleicher zum Vergleich eines charakteristischen Teils eines empfangenen Signals innerhalb eines Übertragungsrahmens mit einem erwarteten Motiv aufweist und einen Schaltkreis zur Umsetzung des ersten oder zweiten Programms zur Verarbeitung eines anderen Teils des empfangenen Signals innerhalb desselben Übertragungsrahmens.
EP01402033A 2000-07-28 2001-07-26 Verfahren zum Kommunizieren zwischen einer Basisstation und einem mobilen Telefon sowie ein dafür geeignetes mobiles Telefon Expired - Lifetime EP1187502B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0010014A FR2812494B1 (fr) 2000-07-28 2000-07-28 Procede de communication entre une station base et un telephone mobile et telephone mobile utilisable pour mettre en oeuvre le procede
FR0010014 2000-07-28

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EP1187502A1 EP1187502A1 (de) 2002-03-13
EP1187502B1 true EP1187502B1 (de) 2004-05-26

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EP (1) EP1187502B1 (de)
DE (1) DE60103467T2 (de)
ES (1) ES2217099T3 (de)
FR (1) FR2812494B1 (de)

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FI3641412T3 (fi) 2017-05-04 2024-01-09 Guangdong Oppo Mobile Telecommunications Corp Ltd Langaton viestintämenetelmä ja laite

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DE19856401A1 (de) * 1998-12-07 2000-06-15 Siemens Ag Verfahren zur Datenübertragung in einem Mobilfunksystem, Mobilstation und Basisstation

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DE60103467T2 (de) 2005-06-23
FR2812494B1 (fr) 2003-02-14
EP1187502A1 (de) 2002-03-13
ES2217099T3 (es) 2004-11-01
DE60103467D1 (de) 2004-07-01
FR2812494A1 (fr) 2002-02-01

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